Question

Va rog frumosssss , multumesc.

Answer 1

E(x)= \frac{ (x+1)^{2} -4}{x} : \frac{ x^{2}-x }{ x^{2} }
E(x)= \frac{ (x+1)^{2} -4}{x} : \frac{ x^{2}-x }{ x^{2} }
E(x) = \frac{x^{2}+2x-3}{x} :  \frac{x(x-1)}{x^{2}}
E(x) = \frac{x^{2}+2x+1-4}{x} ·  \frac{x^{2}}{x(x-1)}
E(x) =  \frac{(x+3)(x-1)}{x} · \frac{x^{2}}{x(x-1)}
E(x) =  \frac{x+3}{x} ·  \frac{x^{2}}{x}
E(x) =  \frac{x+3}{x} ·  \frac{x^{2}}{x}
E(x) =  \frac{x+3}{1} ·  \frac{x}{x}
E(x) = x+3